Arkansas has gotten more bad news on the injury front today.

WR Lucas Miller, who was working his way back from the knee injury he suffered late last year, will be out for 4 to 6 weeks after breaking his collarbone Thursday. Miller went down hard diving to make a catch during the workout. He was in obvious pain and stayed on the field for several minutes.

The Razorbacks say Miller is scheduled to undergo surgery tomorrow to repair his collarbone. If Miller misses just four weeks, he could be back in time for the Georgia game on Sept. 19. If he is out for the full six weeks, Miller would be looking toward a return for the Texas A&M game.

Either way it’s an unfortunate break for Miller, who was looking to add to his 2008 success. The senior caught 30 passes for 490 yards with 2 touchdowns last season before injuring his knee at Mississippi State.

It’s also a blow to Arkansas’ receiving corps. The Razorbacks still have plenty of options at the position with the likes of Joe Adams, London Crawford, Greg Childs and Jarius Wright, but Miller had impressed Arkansas coach Bobby Petrino with how quickly he had come back from his knee injury.

He is the third player to suffer a serious injury during the first two weeks of practice. TE Chris Gragg (dislocated ankle) and CB Isaac Madison (torn ACL) are both out for the season.